define(function (require, exports, module) {
    return function (jQuery) {

        /// <reference path="jquery-1.5.1.js" />

        /*!
        ** Unobtrusive Ajax support library for jQuery
        ** Copyright (C) Microsoft Corporation. All rights reserved.
        */

        /*jslint white: true, browser: true, onevar: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, regexp: true, newcap: true, immed: true, strict: false */
        /*global window: false, jQuery: false */

        (function ($) {
            var data_click = "unobtrusiveAjaxClick",
        data_validation = "unobtrusiveValidation";

            function getFunction(code, argNames) {
                var fn = window, parts = (code || "").split(".");
                while (fn && parts.length) {
                    fn = fn[parts.shift()];
                }
                if (typeof (fn) === "function") {
                    return fn;
                }
                argNames.push(code);
                return Function.constructor.apply(null, argNames);
            }

            function isMethodProxySafe(method) {
                return method === "GET" || method === "POST";
            }

            function asyncOnBeforeSend(xhr, method) {
                if (!isMethodProxySafe(method)) {
                    xhr.setRequestHeader("X-HTTP-Method-Override", method);
                }
            }

            function asyncOnSuccess(element, data, contentType) {
                var mode;

                if (contentType.indexOf("application/x-javascript") !== -1) {  // jQuery already executes JavaScript for us
                    return;
                }

                mode = (element.getAttribute("data-ajax-mode") || "").toUpperCase();
                $(element.getAttribute("data-ajax-update")).each(function (i, update) {
                    var top;

                    switch (mode) {
                        case "BEFORE":
                            top = update.firstChild;
                            $("<div />").html(data).contents().each(function () {
                                update.insertBefore(this, top);
                            });
                            break;
                        case "AFTER":
                            $("<div />").html(data).contents().each(function () {
                                update.appendChild(this);
                            });
                            break;
                        default:
                            $(update).html(data);
                            break;
                    }
                });
            }

            function asyncRequest(element, options) {
                var confirm, loading, method, duration;

                confirm = element.getAttribute("data-ajax-confirm");
                if (confirm && !window.confirm(confirm)) {
                    return;
                }

                loading = $(element.getAttribute("data-ajax-loading"));
                duration = element.getAttribute("data-ajax-loading-duration") || 0;

                $.extend(options, {
                    type: element.getAttribute("data-ajax-method") || undefined,
                    url: element.getAttribute("data-ajax-url") || undefined,
                    beforeSend: function (xhr) {
                        var result;
                        asyncOnBeforeSend(xhr, method);
                        result = getFunction(element.getAttribute("data-ajax-begin"), ["xhr"]).apply(this, arguments);
                        if (result !== false) {
                            loading.show(duration);
                        }
                        return result;
                    },
                    complete: function () {
                        loading.hide(duration);
                        getFunction(element.getAttribute("data-ajax-complete"), ["xhr", "status"]).apply(this, arguments);
                    },
                    success: function (data, status, xhr) {
                        asyncOnSuccess(element, data, xhr.getResponseHeader("Content-Type") || "text/html");
                        getFunction(element.getAttribute("data-ajax-success"), ["data", "status", "xhr"]).apply(this, arguments);
                    },
                    error: getFunction(element.getAttribute("data-ajax-failure"), ["xhr", "status", "error"])
                });

                options.data.push({ name: "X-Requested-With", value: "XMLHttpRequest" });

                method = options.type.toUpperCase();
                if (!isMethodProxySafe(method)) {
                    options.type = "POST";
                    options.data.push({ name: "X-HTTP-Method-Override", value: method });
                }

                $.ajax(options);
            }

            function validate(form) {
                var validationInfo = $(form).data(data_validation);
                return !validationInfo || !validationInfo.validate || validationInfo.validate();
            }

            $("a[data-ajax=true]").live("click", function (evt) {
                evt.preventDefault();
                asyncRequest(this, {
                    url: this.href,
                    type: "GET",
                    data: []
                });
            });

            $("form[data-ajax=true] input[type=image]").live("click", function (evt) {
                var name = evt.target.name,
            $target = $(evt.target),
            form = $target.parents("form")[0],
            offset = $target.offset();

                $(form).data(data_click, [
            { name: name + ".x", value: Math.round(evt.pageX - offset.left) },
            { name: name + ".y", value: Math.round(evt.pageY - offset.top) }
        ]);

                setTimeout(function () {
                    $(form).removeData(data_click);
                }, 0);
            });

            $("form[data-ajax=true] :submit").live("click", function (evt) {
                var name = evt.target.name,
            form = $(evt.target).parents("form")[0];

                $(form).data(data_click, name ? [{ name: name, value: evt.target.value}] : []);

                setTimeout(function () {
                    $(form).removeData(data_click);
                }, 0);
            });

            $("form[data-ajax=true]").live("submit", function (evt) {
                var clickInfo = $(this).data(data_click) || [];
                evt.preventDefault();
                if (!validate(this)) {
                    return;
                }
                asyncRequest(this, {
                    url: this.action,
                    type: this.method || "GET",
                    data: clickInfo.concat($(this).serializeArray())
                });
            });
        } (jQuery));

    } 
});